Electric-arc lamp



Oct. 5 1926.

T. L. CARBONE ELECTRIC ARC LAMP Filed Nov. 25. 1922 Invent 1,4 6W y u i W1 Attorney.

Patented Get. 5, 1926.

ururso srarss sa'rsfsr series,

'rrro LIVIO GARBONE, nnoEAsEn arE or BERLIN,-GERMANY; Br nansr MOMMSEN,

EXECUTOR, or onimrior'rnissn'ae, GERMANY.

ELno-rRio-Aito Lasts.

Application filed November 2-5, 1922, Serial No.

Many attempts have been made .to employ electric arc lamps provided with electrodes which contain as large a percentage as possible of illuminating salts and, notwithstanding the gases which are evolved, to keep the globesas free from deposits. as possible. For this purpose the globes of these, are lamps are specially constructed and provided above the zone of the arc with a recipitat-ing o1 condensing. chamber for the waste gases. The upper electrode otthe superposed electrodes is also providedwvith aplate (a shield or thejlilre) which sur rounds it and which. exerts iiiithefiknown manner a favourable act-ion =on'the arc and the combustion of the carbons. Tlie upper electrode, whichjis guided accurately? a very tical direction inthe coveno'fthe lamp casing, is passcd freely through anaperture in the plate (shield or the like) amn sia:- trodes which are stronglyimpregnated with illuminating salts are employed the phenomenon is observed that deposits adhere between the inner surface of theaperture in the plate which surrounds the upper electrode and the electrode itself and'hinder the free passage of the electrode through it. The regulating mechanism and the quiet burning of the lamp are naturally affected thereby.

In order to overcome this disadvantage, according to the present invention, the plate which surrounds the upper electrode is not connected rigidly to the casing as heretofore, but at least partly movably. It, now, the electrode should become gripped by the accumulation of deposits in the intermediate space between the inner surface of the aperture in the plate and the electrode, the plate will yield in consequence of the manner in which it is connected so as to be movable, and will be moved and thus scrape oit the deposits which are thrown down in the form of fine dust so that the tree passage or feed of the upper electrode through the aperture can take place. The plate which surrounds the upper electrode may with advantage be suspended from the cover of the lamp casing by means of suitable chain-like annular members, whereby the free movement of theplate is ensured. The plate which surrounds the upper electrode consists of several pieces, and some or all the parts of the plate may be suspended so -as to be freely movable.

03,359, and iii Germany July is. i922.

. A constructional example accordingtc'tlie invention is shown in the accompanying drawings in wlii'ch- Figure his a longitudinal section oi: the part otan arc lampto which the invention applies and I I Figure sis-a plan'view oi the plate surrounding the upper electrode.

In. the electric arc lamp, shown in the drawings the two superposed electrodes (1 and b are maintained in the desiredrelative position under the control or a suitable regulating rrieclianis iri in "the known" manner. The upperelecti ede o is guided in the cover c"o f=thelainp, c" "as-ands surrounded by a plate,forfesarnplefashield d of the usual construction; evolved tend to-"ris'e between the up er eiee rode aand the wall'of'the aperturef e' in the -'platej d and to be deposited in the form of a' fin'e' dust. This deposit in the aperture 6 interferes with the free passage of the electrode through it and the result is that the smooth burning of the arc lamp may be at fected. In order to overcome this disadvantage the plate (I is suspended from the cover plate 0 so as to be freely movable, by means of the chain-like members 7, for CK- ample. lVhen the deposit collects in the aperture 6 the plate (Z moves and scrapes the deposit away.

The plate (1 which surrounds the upper electrode a may consist of one piece or or" several pieces, for instance, as shown in Figure 2, in which it consists of three parts d (Z (Z each of which is. suspended in the freely movable manner hereinbetore de scribed.

I claim as the invention of Two Lrvro CARBONEZ 1. In an electric arc-lamp, the combination of the upper carbon with an annular member surrounding said carbon near its lower end and consisting of several segments, each of which is suspended from a stationary lamp-part located above it, at least one of said segments being tiltable and movable horizontally whereby on a deposit being formed between the said upper carbon and the said annular member the feed movement of the said upper carbon is transmitted to the said tiltable and movable part whereby the connection formed by the said deposit between the said upper carbon and the said annular member is broken.

The gases 'i which" are 2. In an electric arc-lamp, the combination of the upper carbon with an annular member surrounding said carbon near its lower end and consisting of several segments each of which is suspended-inovablyfrom a sta' tionary lamp-part located above it so as to be tiltable and movable radially whereby on a deposite being formed between'the said upper carbon and the said annular member. the feed movement of the said upper carbon is transmitted to the said tiltable and movable part whereby the connection'tormed by the saiddeposit between the said upper car'- bon and the said annular member is broken.

3. In an electric arc-lamp the combination of the upper carbon with an annular member surrounding said carbon near. its lower end and consisting. of several segments, each 01- which is suspended by chainlike members from a stationary lamp part located above it so as to be tiltable and movable, radially whereby on adeposite being formed between thesaid upper carbon and thesaid,annular-member the feed movement of the said upper carbon is transmitted to the said tiltable and-movable part whereby the connection formed by the said deposit between thesaid upper carbon and tlie said annular member is broken. V

4. Inan electric arc-lamp, the combination of the'upper carbon with an annularmember surrounding said earbon near its lower end and consisting of several segments, each of which is suspended from the bottom of an upper lamp-casing, at least one of said segments being tilta-ble and movable" horizontally whereby on a deposit being formed between the said upper carbon and the said annular'member the feed movement of the said upper. carbon is transmitted to the said tiltable and movable part whereby the connection formed by the said deposit between the said upper carbon and the said annular member is broken.

In an electric arc-lamp,- the combination of the upper carbon with an annular member surrounding said carbon near its lower end and consisting of several segments, each 0t which is suspended by chain-like members from thebottom of anupper lamp-casing, at least one of said segments beingti-ltable and movable horizontally whereby on a de posit being formed between the said upper, carbon and the; said annulanmember the feed movement of the said upper carbonis transmitted to, the said tiltablejand' movable part whereby the connection formed'by the said deposit between the said upper2. carbon and the said-annular member is, broken. DR. ERNSTMOMMSEN, Executor of the Last We'll and; Te szftrmcjntpf Tito Livia, Ocirbone. I f y 

